Table 2. CHA₂DS₂-VASc Score Interpretation.

Score	Risk of Ischemic Stroke (Event/Hundred Years at Risk)a
0	0.2
1	0.6
2	2.2
3	3.2
4	4.8
5	7.2
6	9.7
7	11.2
8	10.8a
9	12.2

^a Data from the Friberg validation study, but in general would assume the higher the score, the higher the risk of ischemic stroke. CHA₂DS₂-VASc = congestive heart failure, hypertension, age ≥75 years (doubled), diabetes mellitus, prior stroke or TIA or thromboembolism (doubled), vascular disease, age 65 to 74 years, sex category.